udf: Verify symlink size before loading it

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commit a1d47b2629 upstream.

UDF specification allows arbitrarily large symlinks. However we support
only symlinks at most one block large. Check the length of the symlink
so that we don't access memory beyond end of the symlink block.

Reported-by: Carl Henrik Lunde <chlunde@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

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Jan Kara 2014-12-19 12:21:47 +01:00 • committed by Luis Henriques

parent 66c88eab4e

commit ec06d480b2

1 changed files with 13 additions and 4 deletions

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fs/udf/symlink.c

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